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发明名称
Apparatus for determining the force of gravity
摘要
申请公布号
US2000948(A)
申请公布日期
1935.05.14
申请号
US19270213427
申请日期
1927.08.16
申请人
HAYES HARVEY C
发明人
HAYES HARVEY C.
分类号
G01V7/12
主分类号
G01V7/12
代理机构
代理人
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地址
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